Internal corner strip



FIG. 1 is a lower right perspective view of an internal corner strip embodying our new design;

FIG. 2 is a bottom view of the internal corner strip of FIG. 1, the top being a mirror image thereof;

FIG. 3 is a front view of the internal corner strip of FIG. 1, the right side being a mirror image thereof; and,

FIG. 4 is a left side view of the internal corner strip of FIG. 1, the back being a mirror image thereof.

The drawings contain a symbolic break indicated in dot-dash broken lines. The portion between the break lines forms no part of the claimed design. The dash-dash broken lines illustrate portions of the internal corner strip that form no part of the claimed design. 

CLAIM The ornamental design for an internal corner strip, as shown and described. 